CN112649934A - Optical lens, camera module and assembling method thereof - Google Patents

Abstract

The present application relates to an optical lens, comprising: an optical lens, comprising: a first lens component; a second lens component; and a first glue located in a first gap between the first lens piece and the second lens piece, the first glue adapted to support and secure the first lens piece and the second lens piece after curing; the inner side of the first lens barrel is provided with a first containing hole, at least one of the first lenses is embedded into the first containing hole, the first containing hole is polygonal, the outer side surface of the first lens embedded into the first containing hole is circular, and the diameter of an inscribed circle of the polygon on the side surface of the first containing hole is smaller than the diameter of the circle on the outer side surface of the first structural area. The application also provides a corresponding camera module and a corresponding manufacturing method. In this application, the first lens realizes prepositioning in first lens cone more easily, has the space of overflowing glue in the first lens cone simultaneously, avoids glue to spill over and pollutes the lens.

Description

Optical lens, camera module and assembling method thereof

RELATED APPLICATIONS

The application is a divisional application of a parent case with a Chinese patent application number of CN201810541239.8, which is filed on 30.5.2018 and is named as an optical lens, a camera module and an assembling method thereof.

Technical Field

The invention relates to the technical field of optical imaging, in particular to an optical lens, a camera module and an assembling method thereof.

Background

With the popularization of mobile electronic devices, technologies related to camera modules applied to mobile electronic devices for helping users to obtain images (e.g., videos or images) have been rapidly developed and advanced, and in recent years, camera modules have been widely applied to various fields such as medical treatment, security, industrial production, and the like.

In order to meet the increasingly wide market demands, a high-pixel, small-size and large-aperture diaphragm is an irreversible development trend of the existing camera module. However, the need to achieve high pixel, small size, large aperture in the same imaging mold is very difficult. For example, the compact development of mobile phones and the increase of the mobile phone screen occupation ratio make the space inside the mobile phone available for the front camera module smaller and smaller, and the market puts forward higher and higher demands on the imaging quality of the camera module.

In the field of compact camera modules (e.g., camera modules for mobile phones), the quality of the optical imaging lens and the manufacturing errors during the module packaging process often need to be considered. Specifically, in the manufacturing process of the optical imaging lens, factors affecting the lens resolving power come from errors in the respective elements and their assembly, errors in the thickness of the lens spacer elements, errors in the assembly fitting of the respective lenses, variations in the refractive index of the lens material, and the like. The errors of each element and the assembly thereof comprise the errors of the optical surface thickness, the lens optical surface rise, the optical surface shape, the curvature radius, the single lens surface and the surface eccentricity, the lens optical surface inclination and the like of each lens monomer, and the sizes of the errors depend on the precision of the mold and the control capability of the molding precision. The error in the thickness of the lens spacing element depends on the machining accuracy of the element. The error of the fitting fit of each lens depends on the dimensional tolerance of the fitted components and the fitting accuracy of the lens. The error introduced by the change in refractive index of the lens material depends on the stability of the material and batch consistency. The errors of the above elements affecting the image resolution have cumulative deterioration, and the cumulative errors increase with the increase of the number of lenses. The existing resolution solution is to perform tolerance control on the sizes of the elements with high relative sensitivity and compensate for lens rotation to improve the resolution, but because a lens with high pixels and large aperture is sensitive, the tolerance is required to be strict, such as: the eccentricity of a part of sensitive lens 1um lens can bring about 9' image plane inclination, so that the processing and assembling difficulty of the lens is increased, and meanwhile, the feedback period is long in the assembling process, so that the process capability index (CPK) of lens assembling is low, the fluctuation is large, and the reject ratio is high. As described above, because there are many factors affecting the resolution of the lens, the factors exist in a plurality of elements, and the control of each factor has a limit to the manufacturing accuracy, and if the accuracy of each element is simply improved, the improvement capability is limited, the improvement cost is high, and the increasingly improved imaging quality requirements of the market cannot be met.

The applicant provides an assembling method for adjusting and determining the relative positions of an upper sub-lens and a lower sub-lens based on an active calibration process, and then bonding the upper sub-lens and the lower sub-lens together according to the determined relative positions so as to manufacture a complete optical lens or a camera module. The solution can improve the process capability index (CPK) of the optical lens or the camera module which is produced in large scale; the requirements on the precision and the assembly precision of each element of a material (such as a sub-lens or a photosensitive assembly for assembling an optical lens or a camera module) can be relaxed, so that the overall cost of the optical imaging lens and the camera module is reduced; can adjust the various aberrations of the module of making a video recording in real time at the equipment in-process, reduce the defective rate, reduction in production cost promotes the formation of image quality.

However, active calibration of the optical system of the lens is a new production process, and the actual mass production needs to consider many factors such as reliability, falling resistance, weather resistance and manufacturing cost of the optical lens and the camera module, and sometimes needs to face various non-measurable factors to cause yield reduction. For example, in one process scheme, a glue material is filled between the first lens component and the second lens component to maintain the first lens component and the second lens component in relative positions determined by active calibration. However, in actual trial production, the imaging quality of the optical lens and the camera module is often degraded compared with that obtained in the active calibration stage, and the degradation sometimes exceeds the tolerance range, resulting in poor product. The applicant has found that, after an active calibration process is introduced to the assembly of an optical lens or a camera module, variations of a plastic material, a lens barrel or a lens and other unknown factors may be the causes of the above problems. There is a need for a solution that overcomes the above problems to improve product yield.

Disclosure of Invention

The present invention aims to provide a solution that overcomes at least one of the drawbacks of the prior art.

To solve the above technical problem, the present invention provides an optical lens, including:

a first lens part including a first barrel and at least one first lens mounted within the first barrel; the second lens component comprises a second lens barrel and at least one second lens arranged in the second lens barrel, and the at least one second lens and the first lens jointly form an imaging optical system; and a first glue located in a first gap between the first lens piece and the second lens piece, the first glue adapted to support and secure the first lens piece and the second lens piece after curing. The inner side of the first lens barrel is provided with a first containing hole, at least one of the at least one first lens is embedded into the first containing hole, the first containing hole is polygonal, the outer side surface of the first lens embedded into the first containing hole is circular, and the diameter of an inscribed circle of the polygon on the side surface of the first containing hole is smaller than the diameter of the circle on the outer side surface of the first structural area.

Wherein the difference between the radius r of the first lens and the second distance d is not more than 0.005mm, and the second distance d is the distance from the side of the polygon of the first accommodating hole to the center of the first accommodating hole.

Wherein a first distance D of the first accommodation hole is at least 0.015mm greater than a radius r of the first lens embedded in the first accommodation hole, wherein the first distance D is a distance from a vertex of the polygon of the first accommodation hole to a center of the first accommodation hole.

Wherein the first distance D is larger than the radius r of the first lens, the second distance D is smaller than the radius r of the first lens, D-D is more than or equal to 0.02mm, and r-D is less than or equal to 0.005 mm; wherein the first distance D is a distance from a vertex of the polygon of the first accommodating hole to a center of the first accommodating hole, and the second distance D is a distance from an edge of the polygon of the first accommodating hole to the center of the first accommodating hole.

The first lens is provided with a first optical area for imaging and a first structural area surrounding the first optical area, the outer side surface of the first structural area is circular, and the top surface of the first structural area bears against the top surface of the first containing hole.

And adhesive glue is arranged in the area among the side surface of the first containing hole, the top surface of the first containing hole and the outer side surface of the first structure area.

Wherein the polygon is a regular polygon.

Wherein, first holding hole includes first holding layer and is located first drawing glue film of first holding layer below, first holding layer has first holding hole side with first holding hole top surface, the height of first holding hole side is less than the thickness of first structure area, first drawing glue film has first drawing glue film top surface and first drawing glue film side, first drawing glue film side arrives the distance of optical lens's optical axis is greater than first holding hole side arrives the distance of optical axis, the lateral surface of first structure area first drawing glue film top surface with clearance between the first drawing glue film side forms first drawing glue area, it arranges in first drawing glue area in order to with first lens cone is fixed together.

And a first bonding glue containing area is formed among the side surface of the first containing hole, the top surface of the first containing hole and the outer side surface of the first structure area, and the first bonding glue containing area is communicated with the first painting glue area to contain the bonding glue.

Wherein the adhesive glue located in the first glue area forms a ring shape having a notch.

Wherein the first lens is formed by an injection molding process and an outer side surface of the first lens has a lens cut surface; the first lens barrel is formed through an injection molding process, and the outer side surface of the first lens barrel is provided with a lens barrel notch surface; and the lens barrel notch surface is disposed on a side opposite to the lens barrel notch surface.

The inner side of the second lens barrel is provided with a second containing hole, the second lens is embedded into the second containing hole, the second lens is provided with a second optical area for imaging and a second structure area surrounding the second optical area, the side surface of the second containing hole is in close fit with the outer side surface of the second structure area, and the second lens is fixed with the second lens barrel through adhesive glue.

Wherein the first rubber is adapted to support and fix the first lens component and the second lens component so that the relative position of the first lens component and the second lens component is maintained at the relative position determined by the active calibration.

According to another aspect of the present application, there is also provided a camera module, which includes: any one of the optical lenses described above.

According to still another aspect of the present application, there is also provided an optical lens assembling method, including: preparing a first lens part and a second lens part separated from each other, wherein the first lens part includes a first barrel and at least one first lens mounted in the first barrel, and the second lens part includes a second barrel and at least one second lens mounted in the second barrel; pre-positioning the first lens part and the second lens part to enable the at least one first lens and the at least one second lens to jointly form an imaging optical system; performing active calibration according to the actually measured imaging result of the optical system, and determining the relative positions of the first lens component and the second lens component; and bonding the first lens piece and the second lens piece to support and fix a relative position of the first lens piece and the second lens piece. In the preparation step, a first accommodating hole is formed in the inner side of the first lens barrel, the first accommodating hole is provided with a first accommodating hole side face and a first accommodating hole top face, a light through hole is formed in the middle area of the first accommodating hole top face, the first accommodating hole side face is in a polygon shape on a plane perpendicular to the optical axis of the optical lens, the first lens is provided with a first optical area used for imaging and a first structural area surrounding the first optical area, the outer side face of the first structural area is in a circular shape, and the diameter of an inscribed circle of the polygon of the first accommodating hole side face is smaller than the diameter of the circle of the outer side face of the first structural area.

Wherein, first holding hole includes first holding layer and is located the first drawing glue film of first holding layer below, first holding layer has first holding hole side with first holding hole top surface, the height of first holding hole side is less than the thickness of first structure district, first drawing glue film has first drawing glue film top surface and first drawing glue film side, first drawing glue film side arrives the distance of optical axis is greater than first holding hole side arrives the distance of optical axis, the lateral surface of first structure district first drawing glue film top surface with clearance between the first drawing glue film side forms first drawing glue area. In the step of preparing the first lens part and the second lens part separated from each other, further comprising: inverting the first barrel; inserting the first lens into the first accommodating hole, so that the top surface of the first structure area of the first lens is supported against the top surface of the first accommodating hole, and the first optical area of the first lens is positioned at the light-passing hole; and drawing adhesive glue in the first glue drawing area, and curing the adhesive glue to realize the bonding of the first lens and the first lens cone, wherein the adhesive glue forms a ring shape with a gap.

Wherein, in the step of preparing the first lens part and the second lens part which are separated from each other, further comprising: inverting the second barrel, wherein the inner side of the second barrel is provided with a plurality of stages of stepped second accommodating holes; and embedding a plurality of second lenses into the multistage second accommodating holes in sequence, wherein the side surfaces of the multistage second accommodating holes are circular, and each second lens and the corresponding one-stage second accommodating hole form tight fit.

The second accommodating holes of at least one stage of the multiple stages of the second accommodating holes are polygonal accommodating holes, each polygonal accommodating hole is provided with a second accommodating hole side surface and a second accommodating hole top surface, the second accommodating hole side surfaces are polygonal on a plane perpendicular to the optical axis of the optical lens, the second lens is provided with a second optical area for imaging and a second structural area surrounding the second optical area, and the outer side surfaces of the second structural areas are circular; and the step of sequentially embedding the plurality of second lenses into the multistage second accommodating holes further comprises: inserting at least one second lens into the corresponding polygonal receiving hole; and embedding the second lens into the polygonal accommodating hole, forming close fit at the contact part of the side surface of the second accommodating hole and the outer side surface of the second structure area, enabling the top surface of the second structure area to be supported against the top surface of the second accommodating hole, drawing the adhesive glue between the outer side surface of the second structure area and the inner side surface of the second lens barrel, and curing the adhesive glue to fix the second lens and the second lens barrel together.

Wherein, in the step of preparing the first lens part and the second lens part separated from each other, the first barrel and the first lens fitted into the first accommodation hole satisfy: the first distance D is larger than the radius r of the first lens, the second distance D is smaller than the radius r of the first lens, D-D is larger than or equal to 0.02mm, and r-D is smaller than or equal to 0.005 mm; wherein the first distance D is a distance from a vertex of the polygon of the first accommodating hole to a center of the first accommodating hole, and the second distance D is a distance from an edge of the polygon of the first accommodating hole to the center of the first accommodating hole.

Wherein, in the step of preparing the first lens part and the second lens part which are separated from each other, further comprising: forming a first lens with a gate part on the side surface through an injection molding process, wherein the gate part is a part corresponding to an injection port for injecting a liquid molding material in the injection molding process; cutting off a gate portion of the first lens, thereby forming a lens cut surface on a side surface of the first lens; forming a first barrel having the gate portion on a side surface thereof by an injection molding process; and cutting off the gate portion of the first barrel, thereby forming a barrel cut surface at a side surface of the first barrel. And in the step of fitting the first lens into the first accommodation hole, the lens cut surface is disposed on a side opposite to the barrel cut surface.

In the step of preparing the first lens part and the second lens part which are separated from each other, the molding method of the first lens barrel or the second lens barrel includes: preparing a mold, wherein the mold comprises a movable side mold plate, a fixed side mold plate, a plurality of tooth plate groups and a mold core assembly, the movable side mold plate and the fixed side mold plate are detachably connected through the plurality of tooth plate groups, the mold core assembly comprises a forming cavity formed by a movable mold core and a fixed mold core, and the shape of the forming cavity corresponds to the first lens cone or the second lens cone; injecting hot-melt plastic into the forming cavity of the mold to obtain a formed lens cone; and cutting off a gate part of the formed lens barrel to obtain the first lens barrel or the second lens barrel.

According to still another aspect of the present application, there is also provided a camera module assembling method, including: assembling the optical lens by any one of the optical lens assembling methods; and manufacturing a camera module based on the assembled optical lens.

Compared with the prior art, the invention has at least one of the following technical effects:

1. in some embodiments of the present invention, a glue overflow space may be disposed on the first lens barrel, the glue overflow space receives glue from the top surface of the lens, and the glue fixes the lens barrel and the lens partially from the top end of the lens, so as to fix the relative position of the first lens barrel and the first lens better.

2. In some embodiments of the present invention, the first lens barrel has a polygonal accommodating hole, and the first lens is circular, wherein the size from the edge to the center of the polygon is smaller than that of the lens, so that the first lens and the first lens barrel can form a close fit, and the strength between the first lens and the first lens barrel is enhanced.

3. In some embodiments of the present invention, a lens barrel is polygonal, the first lens is circular, wherein the distance from the vertex to the center of the polygon is greater than the diameter of the circular lens, so that the first lens can be assembled into the first lens barrel more easily, wherein the polygon also has an interference relationship with the circle, and the contact portions of the polygon and the circle are arranged at equal intervals around the axis of the first lens barrel, so that the pre-positioning can be realized during the assembly.

4. In some embodiments of the present invention, the glue overflow space (glue containing space) increases the bonding area between the first lens barrel and the glue material, and also increases the bonding area between the first lens and the glue material, thereby increasing the bonding strength between the first lens and the first lens barrel.

5. In some embodiments of the present invention, the cut-out portion of the first lens is disposed to correspond to the cut-out portion of the first barrel, thereby reducing deformation due to a difference in size.

6. In some embodiments of the present invention, the contact portion of the outer side surface of the first lens (the contact portion with the first lens) is uniformly distributed on the outer side surface, so as to uniformly increase the strength between the first lens barrel and the first lens and reduce the lens position deviation caused by the deformation of the lens barrel.

Drawings

FIG. 1 shows a schematic cross-sectional view of an optical lens of one embodiment of the invention;

fig. 2 shows a schematic cross-sectional view of a first barrel of an optical lens according to an embodiment of the present invention;

FIG. 3 illustrates a cross-sectional schematic view of a first lens component of an optical lens of one embodiment of the invention;

fig. 4A shows a schematic cross-sectional view of a first barrel of an optical lens according to another embodiment of the present invention;

FIG. 4B shows a cross-sectional view of one embodiment of the present invention taken along section line A-A shown in FIG. 4A;

FIG. 5A shows a cross-sectional schematic view of a first lens component of an optical lens of one embodiment of the invention;

FIG. 5B shows a cross-sectional view of one embodiment of the present invention taken along section line B-B shown in FIG. 5A;

FIG. 6 is a cross-sectional schematic view of one embodiment of the present invention based on the first lens component shown in FIG. 5B with size markings added;

FIG. 7 illustrates a cross-sectional view of a first lens component of an optical lens of yet another embodiment of the present invention after being taped;

FIG. 8 shows a schematic top view of casting a first barrel according to one embodiment of the invention;

FIG. 9A shows a cross-sectional view of a first lens casting according to one embodiment of the invention;

FIG. 9B shows a top view of a first lens of one embodiment of the present invention after cast molding;

FIG. 10 illustrates a cross-sectional schematic view of a second lens component of an optical lens of one embodiment of the invention;

FIG. 11 illustrates a cross-sectional schematic view of a first lens component of an optical lens of one embodiment of the invention;

FIG. 12A illustrates a top view of the first barrel of the first lens component of the optical lens of FIG. 11 in accordance with one embodiment of the present invention;

FIG. 12B illustrates a top view of the first lens component of the optical lens of FIG. 11 in accordance with one embodiment of the invention;

FIG. 12C illustrates a top view of the optical lens of FIG. 11 after painting of the first lens component in accordance with one embodiment of the present invention;

FIG. 13 illustrates a bottom view of a first lens component of an optical lens of one embodiment of the invention;

FIG. 14A illustrates a relative position adjustment in active calibration in one embodiment of the invention;

FIG. 14B illustrates rotational adjustment in active calibration of another embodiment of the present invention;

FIG. 14C illustrates a relative position adjustment with added v, w direction adjustments in an active calibration of yet another embodiment of the present invention.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that the expressions first, second, etc. in this specification are used only to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, a first body discussed below may also be referred to as a second body without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

As used herein, the terms "substantially," "about," and the like are used as terms of table approximation and not as terms of table degree, and are intended to account for inherent deviations in measured or calculated values that will be recognized by those of ordinary skill in the art.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 shows a schematic cross-sectional view of an optical lens according to an embodiment of the present invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the optical lens includes a first lens component 100, a second lens component 200, and a first plastic 300. The first lens component 100 comprises a first lens barrel 102 and a first lens 101 installed in the first lens barrel 102, and the first lens barrel 102 and the first lens 101 are optionally connected by using an adhesive 103; a second lens component 200, including a second barrel 202 and five second lenses 201 installed in the second barrel 202, where the five second lenses 201 and the first lens 101 together constitute an imageable optical system, and the first barrel 102 is made of a material different from that of the second barrel 202; and a first rubber 300 located in a first gap 400 between the first lens part 100 and the second lens part 200, the first rubber 300 being adapted to support and fix the first lens 101 and the second lens part 200 after curing, wherein an included angle α between an axis 1001 of the first lens part 100 and an axis 2001 of the second lens part 200 is different from zero. In this embodiment, the first lens barrel 102 and the second lens barrel 202 are optionally connected by a first glue 300 to achieve the connection of the first lens part 100 and the second lens part 200. In this embodiment, the first adhesive 300 is disposed between the first lens 101 and the second lens barrel 202, optionally in other embodiments the first adhesive 300 may be disposed between the first lens barrel 102 and the second lens barrel 202 and/or between the first lens 101, the first lens barrel 102, and the second lens barrel 202, optionally in other embodiments the first adhesive 300 may be disposed between the first lens barrel 102 and the second lens 201 and/or between the first lens 101, the first lens barrel 102, and the second lens 201. The first glue 300 may be adapted to support and fix the first lens 101 and the second lens part 200, so that the relative position of the first lens 101 and the second lens part 200 is maintained at the relative position determined by the active calibration. In the embodiment shown in fig. 1, the number of the first lens 101 is one, but it is obvious to those skilled in the art that the number of the first lens 101 may be two or more; similarly, the number of the second lens 201 is 5 in fig. 1, but it is obvious to those skilled in the art that other numbers may be selected for the number of the second lens 201, and the 5 are only examples here.

Fig. 2 shows a schematic cross-sectional view of the first barrel 102 of the optical lens according to the embodiment of the present invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the first barrel 102 has a first accommodating hole 600 on the inner side thereof, the first accommodating hole 600 has a first accommodating hole side surface 6011 and a first accommodating hole top surface 6012, and the middle region of the first accommodating hole top surface 6012 has a light passing hole 700. Fig. 3 shows a schematic cross-sectional view of a first lens component 100 of an optical lens according to an embodiment of the present invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. Referring to fig. 3, the first lens 101 can be inserted into the first receiving hole 600, the first lens 101 has a first optical area 1011 for imaging and a first structural area 1012 surrounding the first optical area 1011, the first receiving hole side 6011 forms a tight fit with the outer side of the first structural area 1012, and the first lens 101 is fixed with the first lens barrel 102 by an adhesive 103. The first lens 101 has a first outer side surface 1013, and the first outer side surface 1013 includes a contact portion and a non-contact portion, wherein the contact portion is in direct contact with the first accommodation hole side surface 6011 and forms a tight fit; the non-contact portion is not in direct contact with the first accommodation hole side 6011, and is bonded to the first barrel 102 by an adhesive glue 103. The tight fit means that the distance from the first containing hole side 6011 to the central axis 1001 of the first lens part 100 is smaller than the distance from the outer side surface of the first structure region 1012 to the central axis 1001 of the first lens part 100, so that the first lens 101 is suitable for being tightly fitted into the first containing hole 600. Fig. 4A is a schematic longitudinal cross-sectional view of the first barrel 102 of the optical lens according to an embodiment of the present invention, wherein the longitudinal cross-sectional view is a cross-sectional view passing through an optical axis of the optical lens, and will not be described in detail below. Fig. 4B shows a schematic cross-sectional view taken on the basis of the section line a-a shown in fig. 4A. Referring to fig. 4A and 4B, in the present embodiment, the first accommodation hole side 6011 has a polygonal shape on a plane perpendicular to the optical axis of the optical lens. Fig. 5A shows a schematic longitudinal sectional view of first lens section 100 of the optical lens of the embodiment of the present invention. Fig. 5B shows a schematic cross-sectional view taken on the basis of the section line B-B shown in fig. 5A. Referring to fig. 5A and 5B, on a plane perpendicular to the optical axis of the optical lens, the outer side surface 1013 of the first structure region 1012 is circular and has a diameter adapted to the shape and size of the polygon 6011 (for example, the diameter of the outer side surface of the first structure region 1012 may be slightly larger than the diameter of an inscribed circle of the polygon, which may also be referred to as an inscribed circle), which is a circle tangent to each side of the polygon, to form a tight fit at the contact portion of the first receiving hole side surface and the outer side surface of the first structure region. In this embodiment, the polygon may be a regular polygon, specifically a regular hexagon, and those skilled in the art may also select polygons with other numbers of sides.

Referring to fig. 3, further, in this embodiment, the first receiving hole 600 includes a first receiving layer 601 and a first painting adhesive layer 602 located below the first receiving layer 601, the first receiving layer 601 has the first receiving hole side surface 6011 and the first receiving hole top surface 6012, the height of the first containment hole side 6011 is less than the thickness of the first structural section 1012, the first make layer 602 has a first make layer top surface 6022 and first make layer side surfaces 6021, the distance from the first glue layer side 6021 to the optical axis is greater than the distance from the first containment hole side 6011 to the optical axis, the gap between the outer side surface 1013 of the first structure region 1012, the first make layer top surface 6022 and the first make layer side surface 6021 forms a first make layer region 800, the adhesive 103 is disposed in the first glue area 800 to fix the first lens 101 and the first barrel 102 together. Referring to fig. 5A, a first adhesive receiving area 900 is formed between the first receiving hole side surface 6011, the first receiving hole top surface 6012, and the outer side surface 1013 of the first structure area 1012, and the first adhesive receiving area 900 is communicated with the first adhesive area 800 to receive the overflowing adhesive 103.

Fig. 6 shows a cross-sectional schematic view based on the first lens component 100 shown in fig. 5B with size markings added. Referring to fig. 6, a first distance D of the first receiving hole 600, which is a distance from a vertex of the polygon of the first receiving hole 600 to a center of the first receiving hole 600, is greater than a radius r of the first lens 101 inserted into the first receiving hole 600. A second distance d of the first receiving hole 600 is smaller than a radius r of the first lens 101 inserted into the first receiving hole 600, and the second distance is a distance from a side of the polygon of the first receiving hole 600 to a center of the first receiving hole 600. Fig. 7 shows a schematic cross-sectional view of the first lens component 100 after painting of the optical lens according to an embodiment of the invention. The cross section of fig. 7 is taken based on the section line C-C in fig. 3. Referring to fig. 7, the adhesive 103 located in the first painting area 800 forms a ring shape having a gap, and the adhesive 103 in the embodiment shown in fig. 7 has one gap, but those skilled in the art will understand that the number of the gaps may be two or more. It should be noted that, in another embodiment, since the glass lens may not have the notch, the first barrel may not have a corresponding notch.

Further, still referring to FIG. 6, in one embodiment, the first distance D is greater than the radius r of the first lens, and D-D is greater than or equal to 0.02mm, and the second distance D is less than the radius r of the first lens, and r-D is less than or equal to 0.005 mm.

In this embodiment of the present invention, the first lens 101 is tightly fitted with the first receiving hole 600, so that the first lens 101 can be tightly clamped in the first barrel 102, thereby facilitating installation; the first accommodating hole side 6011 of the first barrel 102 is designed in a polygonal shape, so that the first lens 101 is installed while the first adhesive receiving area 900 is provided, and an overflowing adhesive material can be received, so that the first optical area 1011 of the first lens 101 is prevented from being polluted, and the imaging quality of an optical system is ensured; the adhesive glue 103 for connecting the first lens 101 and the first lens barrel 102 is in a gap glue painting mode, and has an air exhausting function, so that part deformation caused by expansion of air can be avoided.

Fig. 8 is a schematic top view of the first barrel 102 according to the embodiment of the present invention. Referring to fig. 8, in general, when the first barrel 102 is injection molded, the gate 1021 serves as a passage for pouring hot melted plastic, and after cooling molding, the gate 1021 and the excess plastic that is not molded need to be cut off, and the plastic between the first barrel 102 needs to be cut off, so as to form a cut surface 3000 at the end of the first barrel 102. In addition, in the process, the size of the first barrel 102 changes due to thermal expansion and cold contraction, wherein the size change is small near the notch surface 3000 due to the relatively thin wall thickness and small shrinkage rate; at the same time, because of the pressure loss at the portion away from the gate 1021, the contraction rate of the portion away from the cutout is larger than that of the portion near the gate 1021. Similar problems exist with the first lens 101 during the casting process, using the same principle. Fig. 9A is a cross-sectional view of a first lens 101 cast according to an embodiment of the invention, and fig. 9B is a top view of the first lens 101 cast according to an embodiment of the invention. Referring to fig. 9B, the first lens 101 has a notch surface 2000. Based on the same principle as casting the first barrel 102, the first lens 101 has a large shrinkage rate away from the notch surface 2000. Still referring to fig. 5B, further, in this embodiment, the first lens 101 has a first optical zone 1011 and a first structural zone 1012, the first structural zone 1012 having an extension. The first lens 101 is formed by an injection molding process and the outer side surface of the first lens 101 has a lens cut surface 2000, and the lens cut surface 2000 is a cut surface formed by cutting off the gate 1015 of the first structure region 1012. The first barrel 102 is formed by an injection molding process and an outer side surface of the first barrel 102 has a barrel cut surface 3000 formed by cutting off a gate portion 1021 of the first barrel 102. The gate portion is a portion corresponding to an injection port for injecting a liquid molding material in an injection molding process. In this embodiment, the lens notch plane 2000 is disposed on the opposite side of the barrel notch plane 3000, that is, the end of the first barrel 102 with a large shrinkage rate is disposed at the end of the first lens 101 with a small shrinkage rate, and the end of the first barrel 102 with a small shrinkage rate is disposed at the end of the first lens 101 with a large shrinkage rate. This design allows for a dimensional compensation that makes the structure of the assembled first lens component more stable, helping to reduce quadratic variation after active alignment.

Fig. 10 shows a schematic cross-sectional view of a second lens component 200 of an optical lens according to an embodiment of the present invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. In this embodiment, the inner side of the second barrel 202 may also have the second accommodating hole, the second lens 201 is inserted into the second accommodating hole, the second lens 201 has a second optical area for imaging and a second structural area surrounding the second optical area, the side surface of the second accommodating hole forms a close fit with the outer side surface of the second structural area, and the second lens 201 is fixed to the second barrel 202 by an adhesive. The second accommodating hole in the inner side of the second barrel 202 may also include a second accommodating layer and a second glue layer, and the specific structure thereof is the same as the structure of the first accommodating hole 600 of the first barrel 102 in the embodiment shown in fig. 1, and is not described again.

Further, in another embodiment of the present invention, a camera module based on the optical lens is further provided. The camera module comprises an optical lens and a photosensitive assembly. Wherein the optical lens may be the optical lens in any of the embodiments described above.

There is also provided, in accordance with an embodiment of the present invention, an optical lens assembly method, including:

step S10, a preparation step. A first lens part 100 and a second lens part 200 are prepared to be separated from each other, wherein the first lens part 100 includes a first barrel 102 and at least one first lens 101 mounted in the first barrel 102, and the second lens part 200 includes a second barrel 202 and at least one second lens 201 mounted in the second barrel 202.

Step S20, pre-positioning step. The first lens part 100 and the second lens part 200 are pre-positioned, so that the at least one first lens 101 and the at least one second lens 201 together form an imageable optical system.

Step S30, active calibration step. And performing active calibration according to the measured imaging result of the optical system, and determining the relative positions of the first lens component 100 and the second lens component 200.

Step S40, a bonding step. Bonding the first lens component 100 and the second lens component 200 to support and fix the relative position of the first lens component 100 and the second lens component 200, wherein an included angle alpha between the axis of the first lens component 100 and the axis of the second lens component 200 is not zero.

Referring to fig. 3, in the present embodiment, in the preparation step, the inner side of the first barrel 102 has a first accommodating hole 600, the first accommodating hole 600 has a first accommodating hole side surface 6011 and a first accommodating hole top surface 6012, a middle area of the first accommodating hole top surface 6012 has a light passing hole 700, the first lens 101 is embedded in the first accommodating hole 600, the first lens 101 has a first optical area 1011 for imaging and a first structural area 1012 surrounding the first optical area 1011, the first accommodating hole side surface 6011 forms a tight fit with an outer side surface 1013 of the first structural area 1012, and the first lens 101 is fixed to the first barrel 102 by an adhesive 103.

In one embodiment, the first receiving hole includes a first receiving layer and a first glue line located below the first receiving layer, the first receiving layer has a first receiving hole side surface and a first receiving hole top surface, a height of the first receiving hole side surface is smaller than a thickness of the first structural region, the first glue line has a first glue line top surface and a first glue line side surface, a distance from the first glue line side surface to the optical axis is greater than a distance from the first receiving hole side surface to the optical axis, and a gap between an outer side surface of the first structural region, the first glue line top surface and the first glue line side surface forms a first glue line region, where step S10 may include sub-steps S101, S102 and S103. Steps S101, S102 and S103 are as follows:

in step S101, fig. 11 shows a schematic cross-sectional view of a first lens part 100 of an optical lens according to an embodiment of the present invention. Wherein the cross section is a cross section passing through an optical axis of the optical lens. Referring to fig. 11, the first barrel 102 is inverted. Fig. 12A illustrates a top view of the first barrel 102 of the first lens part 100 of the optical lens of fig. 11, and the first accommodation hole side 6011 has a polygonal structure with reference to fig. 12A;

step S102, referring to fig. 11, the first lens 101 is inserted into the first accommodating hole 600, such that the first accommodating hole top surface 6012 contacts with the top surface of the first structure area 1012 of the first lens 101, and the first optical area 1011 of the first lens 101 is located at the light passing hole 700. Fig. 12B shows a top view of the first lens part 100 of the optical lens of fig. 11, with reference to fig. 12B, wherein the cut surface 2000 of the first lens 101 is disposed on the side opposite to the cut surface 3000 of the first barrel 102;

step S103, fig. 12C shows a top view of the first lens part 100 of the optical lens of fig. 11, and referring to fig. 12C, the adhesive glue 103 is drawn to the first glue layer 602 in the first glue area 800, so as to bond the first lens 101 and the first lens barrel 102, wherein the adhesive glue 103 forms a ring shape with a gap.

Further, in one embodiment, step S101 includes identifying the first barrel 102, identifying the cut surface 3000 of the first barrel 102, and having the cut surface 3000 of the first barrel 102 at a predetermined position. Meanwhile, the first accommodating hole side surface 6011 of the first barrel 102 is identified, whether the first accommodating hole side surface 6011 is damaged or not is judged, whether the second distance d is greater than the radius r of the first lens 101 or not is judged, and if the first accommodating hole side surface 6011 is damaged or the second distance d is less than the radius r of the first lens 101, the first barrel 102 is determined to be a defective product.

Further, in one embodiment, step S102 includes identifying the first lens 101, identifying the cut surface 2000 of the first lens 101, and disposing the cut surface 2000 of the first barrel 102 on the side opposite to the cut surface 3000 of the first barrel 102.

Fig. 13 shows a bottom view of the first lens component 100 of the optical lens according to an embodiment of the present invention, and referring to fig. 13, further, in step S103, the adhesive 103 is drawn to the first adhesive layer 602 in the first adhesive region 800 to form a ring shape having a notch, where the notch is disposed corresponding to a vertex of the polygon.

In one embodiment, step S10 may include sub-steps S104 and S105. Steps S104 and S105 are as follows:

step S104, inverting the second lens barrel 202, wherein the inner side of the second lens barrel is provided with a plurality of stages of stepped second accommodating holes, and the side surfaces of the plurality of stages of second accommodating holes are circular;

and step S105, sequentially embedding a plurality of second lenses into the multistage second accommodating holes, wherein each second lens is tightly matched with the corresponding first-stage second accommodating hole.

In one embodiment, at least one of the second accommodating holes of the plurality of stages is a polygonal accommodating hole having a second accommodating hole side surface and a second accommodating hole top surface, and the second accommodating hole side surface is polygonal on a plane perpendicular to the optical axis of the optical lens, the second lens has a second optical area for imaging and a second structural area surrounding the second optical area and the outer side surface of the second structural area is circular, wherein steps S104 and S105 can be replaced by steps S104, S105 and S106. Steps S104, S105 and S106 are as follows:

step S104, inverting the second lens barrel 202, wherein the side surface of the second accommodating hole is in a polygonal structure;

step S105, embedding the second lens 201 into the first accommodating hole 600, so that the side surface of the second accommodating hole contacts with the outer side surface of the second structure region to form a tight fit, and the top surface of the second structure region is supported against the top surface of the second accommodating hole;

step S106, drawing the adhesive glue to a gap between the outer side surface of the second lens 201 and the side surface of the first accommodating hole 600, so as to bond the second lens 201 and the second barrel 202, wherein the adhesive glue forms a ring shape with a gap.

In one embodiment, step S10 may include sub-steps S1001, S1002, S1003, and S1004, among others. Steps S1001, S1002, S1003, and S1004 are as follows:

step S1001, forming a first lens with a gate part on the side surface through an injection molding process, wherein the gate part is a part corresponding to an injection port used for injecting a liquid molding material in the injection molding process;

step S1002, cutting off a gate portion of the first lens, thereby forming a lens cut surface on a side surface of the first lens;

a step S1003 of cutting off the gate portion of the first barrel, thereby forming a barrel cut surface on a side surface of the first barrel;

step S1004 of disposing the lens cut surface on a side opposite to the barrel cut surface in the step of fitting the first lens into the first accommodation hole.

According to an embodiment of the present invention, there is also provided a molding method of a lens barrel, including:

step S100, preparing a mold, wherein the mold is provided with a movable side mold plate, a fixed side mold plate, a plurality of tooth plate groups and a mold core assembly, the movable side mold plate and the fixed side mold plate are detachably connected through the plurality of tooth plate groups, the mold core assembly is provided with an accommodating cavity formed by a movable mold core and a fixed mold core, and hot-melt plastics can be formed into a lens cone with a polygonal shape in the accommodating cavity.

Step S200, injecting hot-melt plastic into a mold with a polygonal shape;

step S300, cutting off the gate portion of the lens barrel, thereby forming a barrel cut surface on a side surface of the lens barrel.

Further, in another embodiment of the present invention, an assembling method of an image pickup module based on the optical lens is also provided. The camera module assembly side comprises an optical lens and a photosensitive assembly. The assembling method of the optical lens can be the assembling method of the optical lens in any of the foregoing embodiments.

On the basis of the above embodiment, further, the number of the first lens 101 may be smaller than the number of the second lens 201, and the second lens 201 is closer to the photosensitive chip than the first lens 101. Further, in one embodiment, the number of the first lenses 101 is one, and the outer diameter of the first lenses 101 is larger than the second lens 201 with the smallest outer diameter.

Further, in another embodiment of the present invention, a camera module based on the optical lens is further provided. The camera module comprises an optical lens and a photosensitive assembly. Wherein the optical lens may be the optical lens in any of the embodiments described above. The secondary variation of the optical system of the camera module after the active calibration is completed can be reduced, so that the imaging quality of the camera module is guaranteed, and the yield of mass production is improved. In some embodiments, the camera module may further include a motor (or other type of optical actuator), and the optical lens may be mounted within a cylindrical carrier of the motor, the base of the motor being mounted to the top surface of the photosensitive assembly. The photosensitive member may include, for example, a wiring board, a photosensitive chip mounted on a surface of the wiring board, a ring-shaped support formed on or mounted on the surface of the wiring board and surrounding the photosensitive chip, and a color filter. The ring support may form a step, and the color filter is mounted on the step of the ring support. The base of the motor is mounted on the top surface of the ring-shaped support body.

Further, the active calibration described herein may adjust the relative positions of the first lens component 100 and the second lens component 200 in multiple degrees of freedom. FIG. 14A illustrates a relative position adjustment in active calibration in one embodiment of the invention. In this adjustment manner, the first lens part 100 (or the first lens 101) can move along the x, y, and z directions relative to the second lens part 200 (i.e., the relative position adjustment in this embodiment has three degrees of freedom). Where the z-direction is the direction along the optical axis and the x, y-directions are the directions perpendicular to the optical axis. The x, y directions both lie in a tuning plane P within which translation can be resolved into two components in the x, y directions.

FIG. 14B illustrates rotational adjustment in active calibration according to another embodiment of the present invention. In this embodiment, the relative position adjustment has an increased rotational degree of freedom, i.e., adjustment in the r direction, in addition to the three degrees of freedom of fig. 14A. In the present embodiment, the adjustment in the r direction is a rotation in the adjustment plane P, i.e. a rotation around an axis perpendicular to the adjustment plane P.

Further, fig. 14C shows a relative position adjustment manner with v and w direction adjustments added in the active calibration according to yet another embodiment of the present invention. Where the v direction represents the rotation angle of the xoz plane, the w direction represents the rotation angle of the yoz plane, and the rotation angles of the v direction and the w direction may be combined into a vector angle representing the total tilt state. That is, by the v-direction and w-direction adjustment, the tilt posture of the first lens component 100 with respect to the second lens component 200 (i.e., the tilt of the optical axis of the first lens component 100 with respect to the optical axis of the second lens component 200) can be adjusted.

The adjustment of the above-mentioned six degrees of freedom x, y, z, r, v, and w may affect the imaging quality of the optical system (e.g., affect the magnitude of the resolution). In other embodiments of the present invention, the relative position adjustment may be performed by adjusting only any one of the six degrees of freedom, or by a combination of any two or more of the six degrees of freedom.

Further, in an embodiment, in the active calibration step, the movement further comprises a translation in the adjustment plane, i.e. a movement in the x, y direction.

Further, in one embodiment, the active calibration further comprises: and adjusting and determining the included angle of the axis of the first lens component 100 relative to the axis of the second lens component 200, namely the adjustment in the w and v directions according to the measured resolution force of the optical system. In the assembled optical lens or camera module, an included angle between the axis of the first lens component 100 and the axis of the second lens component 200 may be different from zero.

Further, in one embodiment, the active calibration further comprises: moving the first lens component 100 in a direction perpendicular to the adjustment plane (i.e. adjustment in z-direction), the relative position between the first lens component 100 and the second lens component 200 in the direction perpendicular to the adjustment plane is determined from the measured resolving power of the optical system.

Further, in one embodiment, in the pre-positioning step, a gap is provided between the bottom surface of the first lens component 100 and the top surface of the second lens component 200; and in the bonding step, the adhesive material is arranged in the gap.

In one embodiment, in the active calibration step, the second lens component 200 may be fixed, the first lens component 100 may be held by a clamp, and the first lens component 100 may be moved by a six-axis movement mechanism connected to the clamp, so as to achieve the above-mentioned relative movement between the first lens component 100 and the second lens component 200 in six degrees of freedom. Wherein the clip may bear against or partially bear against a side of the first lens component 100, thereby clipping the first lens component 100.

The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (22)

1. An optical lens, comprising:

a first lens part including a first barrel and at least one first lens mounted within the first barrel;

the second lens component comprises a second lens barrel and at least one second lens arranged in the second lens barrel, and the at least one second lens and the first lens jointly form an imaging optical system; and

a first glue located in a first gap between a first lens piece and a second lens piece, the first glue adapted to support and secure the first lens piece and the second lens piece after curing;

the inner side of the first lens barrel is provided with a first containing hole, at least one of the at least one first lens is embedded into the first containing hole, the outer side surface of the first lens embedded into the first containing hole is circular, and the diameter of an inscribed circle of the first containing hole is smaller than the diameter of the circle of the outer side surface of the first structure area.

2. An optical lens according to claim 1, characterized in that the first receiving hole is polygonal, the difference between the radius r of the first lens and the second distance d, which is the distance from the edge of the polygon of the first receiving hole to the center of the first receiving hole, is not more than 0.005 mm.

3. An optical lens according to claim 1, wherein the first receiving hole has a polygonal shape, and a first distance D of the first receiving hole, which is a distance from a vertex of the polygonal shape of the first receiving hole to a center of the first receiving hole, is at least 0.015mm greater than a radius r of the first lens fitted into the first receiving hole.

4. An optical lens according to claim 1, wherein the first accommodating hole is polygonal, the first distance D is greater than the radius r of the first lens, the second distance D is less than the radius r of the first lens, D-D is greater than or equal to 0.02mm, and r-D is less than or equal to 0.005 mm; wherein the first distance D is a distance from a vertex of the polygon of the first accommodating hole to a center of the first accommodating hole, and the second distance D is a distance from an edge of the polygon of the first accommodating hole to the center of the first accommodating hole.

5. The optical lens of claim 1, wherein the first receiving hole further has a first receiving hole top surface, a middle area of the first receiving hole top surface has a light passing hole, the first lens has a first optical area for imaging and a first structural area surrounding the first optical area, an outer side surface of the first structural area is rounded, and a top surface of the first structural area bears against the first receiving hole top surface.

6. An optical lens according to claim 5, characterized in that the areas between the first receptacle hole side faces, the first receptacle hole top faces and the outer side faces of the first structure regions are provided with adhesive glue.

7. An optical lens according to claim 6, characterized in that the first receiving hole is in the shape of a regular polygon.

8. The optical lens of claim 6, wherein the first receiving hole comprises a first receiving layer and a first painting glue layer located under the first receiving layer, the first containing layer is provided with a first containing hole side surface and a first containing hole top surface, the height of the first containing hole side surface is smaller than the thickness of the first structure area, the first drawing adhesive layer is provided with a first drawing adhesive layer top surface and a first drawing adhesive layer side surface, the distance from the first drawing adhesive layer side surface to the optical axis of the optical lens is greater than the distance from the first accommodating hole side surface to the optical axis, a first painting glue area is formed by a gap between the outer side surface of the first structure area, the top surface of the first painting glue layer and the side surface of the first painting glue layer, the adhesive glue is arranged in the first glue painting area to fix the first lens and the first lens barrel together.

9. An optical lens according to claim 8, wherein a first adhesive receiving area is formed between the first receiving hole side surface, the first receiving hole top surface and the outer side surface of the first structure area, the first adhesive receiving area communicating with the first adhesive area to receive the adhesive.

10. An optical lens according to claim 8, wherein the adhesive glue located in the first glue area forms a ring shape having a notch.

11. An optical lens according to claim 1, characterized in that the first lens is formed by an injection molding process and an outer side surface of the first lens has a lens cut surface;

the first lens barrel is formed through an injection molding process, and the outer side surface of the first lens barrel is provided with a lens barrel notch surface; and

the lens barrel cut surface is disposed on a side opposite to the lens barrel cut surface.

12. An optical lens barrel according to claim 1, wherein the inner side of the second lens barrel has a second receiving hole, the second lens is inserted into the second receiving hole, the second lens has a second optical area for imaging and a second structure area surrounding the second optical area, the side surface of the second receiving hole forms a close fit with the outer side surface of the second structure area, and the second lens is fixed with the second lens barrel by an adhesive glue.

13. An optical lens as claimed in claim 1, wherein the first glue is adapted to support and secure the first and second lens components so that the relative positions of the first and second lens components are maintained at the relative positions determined by active calibration.

14. The utility model provides a module of making a video recording which characterized in that includes: an optical lens as claimed in any one of claims 1 to 13.

15. An optical lens assembly method, comprising:

preparing a first lens part and a second lens part separated from each other, wherein the first lens part includes a first barrel and at least one first lens mounted in the first barrel, and the second lens part includes a second barrel and at least one second lens mounted in the second barrel;

pre-positioning the first lens part and the second lens part to enable the at least one first lens and the at least one second lens to jointly form an imaging optical system;

performing active calibration according to the actually measured imaging result of the optical system, and determining the relative positions of the first lens component and the second lens component; and

bonding the first lens piece and the second lens piece to support and fix the relative positions of the first lens piece and the second lens piece;

in the preparation step, a first accommodating hole is formed in the inner side of the first lens barrel, the first accommodating hole is provided with a first accommodating hole side face and a first accommodating hole top face, a light through hole is formed in the middle area of the first accommodating hole top face, the first accommodating hole side face is in a polygon shape on a plane perpendicular to the optical axis of the optical lens, the first lens is provided with a first optical area used for imaging and a first structural area surrounding the first optical area, the outer side face of the first structural area is in a circular shape, and the diameter of an inscribed circle of the polygon of the first accommodating hole side face is smaller than the diameter of the circle of the outer side face of the first structural area.

16. A lens assembling method according to claim 15, wherein the first receiving hole includes a first receiving layer and a first painting layer located below the first receiving layer, the first receiving layer has the first receiving hole side surface and the first receiving hole top surface, the first receiving hole side surface has a height smaller than a thickness of the first structure region, the first painting layer has a first painting layer top surface and a first painting layer side surface, a distance from the first painting layer side surface to the optical axis is larger than a distance from the first receiving hole side surface to the optical axis, a gap between an outer side surface of the first structure region, the first painting layer top surface, and the first painting layer side surface forms a first painting region, and in the step of preparing the first lens component and the second lens component separated from each other, the method further comprises:

inverting the first barrel;

inserting the first lens into the first accommodating hole, so that the top surface of the first structure area of the first lens is supported against the top surface of the first accommodating hole, and the first optical area of the first lens is positioned at the light-passing hole;

and drawing adhesive glue in the first glue drawing area, and curing the adhesive glue to realize the bonding of the first lens and the first lens cone, wherein the adhesive glue forms a ring shape with a gap.

17. The lens assembling method according to claim 15, wherein in the step of preparing the first lens part and the second lens part which are separated from each other, further comprising:

inverting the second barrel, wherein the inner side of the second barrel is provided with a plurality of stages of stepped second accommodating holes; and

and sequentially embedding a plurality of second lenses into the multistage second accommodating holes, wherein the side surfaces of the multistage second accommodating holes are circular, and each second lens is tightly matched with the corresponding one-stage second accommodating hole.

18. The lens assembly method according to claim 17, wherein at least one of the plurality of stages of second receiving holes is a polygonal receiving hole having a second receiving hole side surface and a second receiving hole top surface, and the second receiving hole side surface is polygonal in a plane perpendicular to the optical axis of the optical lens, the second lens has a second optical area for imaging and a second structural area surrounding the second optical area, and an outer side surface of the second structural area is circular; and

the step of sequentially inserting the plurality of second lenses into the multistage second accommodation holes further comprises: inserting at least one second lens into the corresponding polygonal receiving hole; and embedding the second lens into the polygonal accommodating hole, forming close fit at the contact part of the side surface of the second accommodating hole and the outer side surface of the second structure area, enabling the top surface of the second structure area to be supported against the top surface of the second accommodating hole, drawing the adhesive glue between the outer side surface of the second structure area and the inner side surface of the second lens barrel, and curing the adhesive glue to fix the second lens and the second lens barrel together.

19. The lens assembly method of claim 15, wherein in the step of preparing the first lens part and the second lens part separated from each other, the first barrel and the first lens fitted into the first accommodation hole satisfy: the first distance D is larger than the radius r of the first lens, the second distance D is smaller than the radius r of the first lens, D-D is larger than or equal to 0.02mm, and r-D is smaller than or equal to 0.005 mm; wherein the first distance D is a distance from a vertex of the polygon of the first accommodating hole to a center of the first accommodating hole, and the second distance D is a distance from an edge of the polygon of the first accommodating hole to the center of the first accommodating hole.

20. The lens assembling method according to claim 15, wherein in the step of preparing the first lens part and the second lens part which are separated from each other, further comprising:

forming a first lens with a gate part on the side surface through an injection molding process, wherein the gate part is a part corresponding to an injection port for injecting a liquid molding material in the injection molding process;

cutting off a gate portion of the first lens, thereby forming a lens cut surface on a side surface of the first lens;

forming a first barrel having the gate portion on a side surface thereof by an injection molding process; and

cutting off the gate portion of the first barrel, thereby forming a barrel cut surface at a side surface of the first barrel;

and in the step of fitting the first lens into the first accommodation hole, the lens cut surface is disposed on a side opposite to the barrel cut surface.

21. The lens assembly method according to claim 15, wherein in the step of preparing the first lens part and the second lens part separated from each other, the molding method of the first barrel or the second barrel includes:

preparing a mold, wherein the mold comprises a movable side mold plate, a fixed side mold plate, a plurality of tooth plate groups and a mold core assembly, the movable side mold plate and the fixed side mold plate are detachably connected through the plurality of tooth plate groups, the mold core assembly comprises a forming cavity formed by a movable mold core and a fixed mold core, and the shape of the forming cavity corresponds to the first lens cone or the second lens cone;

injecting hot-melt plastic into the forming cavity of the mold to obtain a formed lens cone; and

and cutting off a gate part of the formed lens barrel to obtain the first lens barrel or the second lens barrel.

22. A camera module assembly method is characterized by comprising the following steps: assembling an optical lens using the optical lens assembling method of any one of claims 15 to 21; and manufacturing a camera module based on the assembled optical lens.

Images